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risonanza : 32 phrases in 9 subjects |
| Antennas and waveguides | 6 |
| Electricity generation | 4 |
| Electronics | 3 |
| Lighting other than cinema | 2 |
| Magnetics | 3 |
| Physics | 1 |
| Piezoelectric crystals | 10 |
| Radiobiology | 2 |
| Rail transport | 1 |
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